Foam-destroying device



Dec. 7, 1926.. 1,509,413

M. KRISTOFFERSS ON FOAM DESTROYING DEVICE Filed March 24, 1926 2 Sheets-Sheet 1 M. KRlsToFFERssON FOAM DESTROYING' DEVICE Dec 7 1926.

Filed March 24. 1926' 2 Sheets-Sheet 2 1 51 Venn 21- ne Dec; 7; i926.

imenus x'n s'rorrnnsson, or LIMHAMM', swnnnm roAm-nnsrnovine nnvroa.

'- Application filed March 24, 1926, SerialHo. 97,134, and in Sweden March 2 8, 1928, Ii I i My invention relates to a foam -destroying device especially adapted to be used in dairies for reducing foam accompanying also for othersimilar'purposes.

the skimmed mill: from the separators into liquid, although the apparatus may be used According to the present invention a ro-' tary impeller or vane wheel is used in the same way as hitherto has been the case but the new wheel is given a peculiar shape resulting in an improved mode of operation and a substantially increased effectiveness.

By way of example an embodiment of the invention is illustrated in. the accompanying drawing in which:

Fi 1 is an elevation of the foamJ-destroying' device.

. 215 an elevation perpendicular to of the wormwheel outside the housing car; i ries a jest jand loose'pulley or thelike by means of which it is put into rotation, and the worm is carried by a: vertical shaft 2 carrying the vane wheel 3 at its lower end;

This mode of driving mechanism is only shown by way of example and comprises no essential part of the present invention. The

frame 1 is placed on top of a receptacle 4* in which the foam is to, be destroyed, the vane-wheel being contained in said receptacle. I

j According to the form shown the vane wheel is; provided with fourradial vanes,

- -eacheonsistingof apla'taormeta'l sheet 5 the lower and outer edges of which are bent forwards inthe direction "of rotation of the: wheelin'ffsuch a way that each;vane. hasthe shape as; cuporthelike. "As shown in thedrawing the outer ',"dge '6 is-bent' forwards substantially at afrightiangle to the sheet 5, while the lower edge ,7 is not bent abrupts -,ly butfrounded as shown in Figs. 1-. and 2;"

This shape of the'edges or the side walls of, the vanes, howeven may vary within-certain limits, and" the lower sidewall of the Jcupor the bent lower edge of the sheet may also be wholly dispensed with, it for 1nstance the vane or. the sheet-is placed m a somewhat'..slantingposition insuch a way that the lower edge of the vane or-sheet 1B the forward one in the direction of rotation. The vanes arev preferably fastened to the g. 3 isa horizontal cross sectional view under side ofadisc 9 carried the'lower end of the shaft 2, though they also may be fastened to or carried by the shaft in any- ,other way. The whole vane wheel may in the form shown be formed in a very simple manner by only two pieces of sheet, but the construction for joining together of the vane wheel per se'is not an essential part of the invention and-may be varied in difierent ways.

cup or the planemain portion 5;of the sheet in each vane a narrow slot or opening 8 is provided which is of a great importance for the invention as will be understood by the following description of the mode/of action of the apparatus.

At the rotation of -the vane wheel the foam-floating on top of the liquid inthe'receptacle 4 is caught by "the cup shapedvanes 5 in which said foam acted upon by the gadially outwardscentrifugal force-is moved along the bottomof the on and compressed I In the angle between the outer wall or v I the edge portion 6 and the bottom of the against the outer wall 6, whereafter it is pressed out through the narrow slot 8, si-

multaneously being reduced to liquid. For obtaining this result it is important to keep the slot 8 as narrow as POSS1bl6,- so that all air-bubbles in the foam are'positively torn asunder whenthey are pressed out through the same. When suficiently narrow or correctly dimensioned slots are used the action will'be extraordinarily effective, and the eficiency. of the device is much greater than in any hitherto known foam-destroying device provided" with vane wheel. By means of acomparatively small vane wheel and an inconsiderable consumption of ppwer much larger quantities of .foam can destroyed during a certain time than hitherto.

The mode of operation and the great 'eiii ciencyof the new foam-destroying device involve the advantage that; the whole apparatus may-be carried out in such small a size that it becomes easily portable and can be Ihe vessel gin whichthe apparatus is used ought, o course, to vbe arranged in such-a manner that the :foam fioating on topof the liquid, which for instance is supplied to the vessel continually, will not be'in a position to "leavethe vessel, untiljit has been-condensed.

In'the ap aratus shown inthedrawing the y moved and applied to any milk-receptacle.

- the liquid may be maintained, andthis outlet is connected with a pipe 11 reaching to the bottom of the vessel in order'to prevent the foam from escaping through the outlet. n

It is not necessary that the vane wheel is immersed in the foam to be destroyed,.as the wheel sucks in the foam.

Another advantage of the new apparatus is that it can be cleaned very easily, as all its surfaces are easily accessible.

7 What I claim is:

1. A foam-destroying device comprising a vane wheel having cup shaped vanes provided with a narrow slot at their outer wall through which slotthe foam caught by the vane and thrown outwards by the centrifugal force is pressed out after having been compressed against said outer wall.

2. A foam-destroying device comprising a vane wheel having cup shaped ,vanes consisting of plane radially arranged. plates parallel to the shaft of the vane wheel, the outer edges of said plates being bent in a right angle in the direction of rotation and a narrow slot being provided in said angle.

3. A foam-destroymg device comprising a vane wheel having cup shaped vanes provane wheel having of radially arranged .plates parallel to the shaft of the vane wheel and at their lower edge bent forwards in the direction of-rotation. a

4. A foam-destroying device comprising a vane wheel having cup shaped vanes provided with a narrow slot at their outer wall through which 'slot the foam caught by the vane and thrown outwards by the centrifugal force is pressed out, said vanes being fastened to the under side of a disc carried by the vertical shaft'of the vane wheel.

5. A foam-destroying device comprising a vided with a narrow slot at their outer wall through which slot the foam caught by the vane and thrown outwards by the centrifu-.

gal force is pressed out, the vane wheel and its drivingfgear being mounted on and carried by-a common portable frame.

In testimony whereof, Iv have signed my name to this specification.

MAGNUS KnrsgrorrnassoN.

cup shaped vanes pro-- 

